R8-NM1-R datasheet(4/10 Pages) MSYSTEM

4 / 10 page

MODEL: R8-NM1

R8-NM1 SPECIFICATIONS

ES-9722 Rev.5 Page 4/10

http://www.m-system.co.jp/

MODBUS FUNCTION CODES & SUPPORTED CODES

■ Data and Control Functions

CODE

NAME

Read Coil Status

Digital output from the slave

Read Input Status

Status of digital inputs to the slave

Read Holding Registers

General purpose register within the slave

Read Input Registers

Collected data from the

eld by the slave

Force Single Coil

Digital output from the slave

Preset Single Registers

General purpose register within the slave

Read Exception Status

Diagnostics

Program 484

Poll 484

Fetch Comm. Event Counter

Fetch a status word and an event counter

Fetch Comm. Event Log

A status word, an event counter, a message count and

eld of event bytes

Program Controller

Poll Controller

Force Multiple Coils

Digital output from the slave

Preset Multiple Registers

General purpose register within the slave

Report Slave ID

Slave type / ‘RUN’ status

Program 884 / M84

Reset Comm. Link

Read General Reference

Write General Reference

Mask Write 4X Register

Read/Write 4X Registers

Read FIFO Queue

■ Exception Codes

CODE

NAME

Illegal Function

Function code is not allowable for the slave

Illegal Data Address

Address is not available within the slave

Illegal Data Value

Data is not valid for the function

Slave Device Failure

Acknowledge

Slave Device Busy

Negative Acknowledge

Memory Parity Error

■ Diagnostic Subfunctions

CODE

NAME

Return Query Data

Loop back test

Restart Comm. Option

Reset the slave and clear all counters

Return Diagnostic Register

Contents of the diagnostic data (2 bytes)

Change ASCII Input Delimiter

Delimiter character of ASCII message

Force Listen Only Mode

Force the slave into Listen Only Mode

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